speed, pace, rate怎么區(qū)分呀

pace一般表示步伐，步伐節(jié)奏
rate強(qiáng)調(diào)比例和比率，有百分比的含義
speed就是平常所指的速度，比如車速等等

speed 1.n.運(yùn)動(dòng)的速度、速率：He reduced speed and turned left.
2.n.(發(fā)生或進(jìn)行的）速度、進(jìn)度：the processing speed of the computer
3.n.快、迅速：The accident was due to excessive speed.
pace 1.n.（移動(dòng)的）速度、步速：to set off at a steady pace
2.n.發(fā)生的速度、步伐、節(jié)奏：It is difficult to keep up with the rapid pace of change.
3.n.走出的一步、步幅、一步的距離
4.n.迅速出現(xiàn)（或變化等）、快節(jié)奏：The novel lacks pace.
5.v.來(lái)回踱步、走來(lái)走去/調(diào)整節(jié)奏
rate 1.n.速度、進(jìn)度：at an average rate of 5 kilometres
2.n.比率、率：a rising rate of unemployment

3.